<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>这是一个框架雏形</title>
</head>
<frameset rows="80,*">
<frame src="head.html" name="head"> 
    <frameset cols="25%,*">
        <frame src="left.html" name="left"> 
        <frame src="right.html" name="right">
    </frameset>
<noframes>
    <body>
        此网页使用了框架，但你的浏览器不支持框架
    </body>
</noframes>
</frameset>
</html>